Boran (n=25) and BoranHolstein (n=11) cows were superovullatedFSH with three doses level (300, 250 and 200IU) divided in to morning and afternoon decreasing doses over 4 daysto study the superovulatory response and embryo production potential. Time to estrus, duration of estrus, and CL count were used to determine superovulatory response. Embryos were flushed on Day 16/17 by non-surgical gravitational method and evaluated for development stage, and quality grade. The mean (±SEM) time interval from CIDR withdrawal to onset of estrus was 20.4±1.8 hours, and breed difference was not significant.However, the interval from CIDR removal to onset of estrus was shorter (p=0.01) in cows treated with 250 IU FSH (10.75±3.3 hours) than in cows received 200 or 300 IU. The total CL count was significantly higher (p=0.01) in Boran (10.1CL/cow/cycle) than Boran x Holstein cows (7.2CL/cow/cycle). A mean number of 4.1 and 2.67embryos’/cow were flushed from Boran and BoranHolstein, respectively. The average transferable embryos/cow were 3.8±0.57 and 2.67±0.99 in Boran and BoranHolstein, respectively. And hence, Boran cows’ response to superovulation and yield of better quality and number of embryo than their BoranHolstein counterparts showed the high potential of the breed for in-vivo and in-vitro embyo production.
